CN215933254U - Flexible mineral insulation fireproof cable without metal sleeve - Google Patents

Abstract

The utility model discloses a metal-sleeve-free flexible mineral-insulated fireproof cable which comprises a copper conductive wire core, wherein a mineral insulating layer is wrapped outside the copper conductive wire core. The utility model has the function of transmitting electric energy through the copper conductive wire core, can be a round solid core, and also can be a multi-core round twisted together, the mineral insulating layer adopts non-calcined aurum mica tape and extruded cross-linked polyethylene to be formed at one time, the multi-layer overlapped concentric wrapping mode is adopted, the cross-linked polyethylene is formed by one-time extrusion, the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after cross-linking, the waterproof performance and the electric insulating performance of the cable are fully ensured, the fireproof oxygen-isolating layer adopts jelly formed by mixing magnesium oxide powder and building emulsion, the jelly is uniformly extruded and wrapped around the cable through a double-screw grouting machine and is filled into gaps of the wire core, and then the jelly is tightened by using a fireproof wrapping belt, and the function of isolating oxygen attenuation heat is fully realized.

Description

Flexible mineral insulation fireproof cable without metal sleeve

Technical Field

The utility model relates to the technical field of cables, in particular to a metal-sleeve-free flexible mineral-insulated fireproof cable.

Background

The inorganic insulated cable without the metal sheath is a novel fireproof cable which is improved on the basis of the defects of the mineral insulated cable, along with the continuous popularization of the product, the excellent performance of the inorganic insulated cable is more and more accepted by customers, the inorganic insulated cable is widely applied to basic industry and civil construction at present, the defect that the production length of the mineral insulated cable is limited cannot be overcome by the existing cable, the problem of an intermediate joint occurs in installation and laying, the insulating layer is easy to damp, the fireproof performance is poor, and the installation and laying are troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a metal-sleeve-free flexible mineral-insulated fireproof cable, which has the advantages of fire resistance and moisture resistance, and solves the problems that the existing cable cannot overcome the defect that the production length of the mineral-insulated cable is limited, an intermediate joint is generated during installation and laying, an insulating layer is easy to damp, and the fireproof performance is poor.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a flexible mineral insulation fireproof cable of no metal covering, includes copper conductor core, the outside parcel of copper conductor core has the mineral insulation layer, the outside parcel of mineral insulation layer has crowded insulating layer of package, the outside parcel of crowded insulating layer of package has the fire-retardant filling rope of steamed, the outside parcel of fire-retardant filling rope of steamed has the fire-retardant band layer of steamed, the outside parcel on fire-retardant band layer of steamed has the fire prevention to separate the oxygen layer, the outside parcel on fire prevention separates the oxygen layer has the fire-retardant oversheath of steamed low cigarette of steamed.

Preferably, the copper conductive wire core is formed by circularly twisting multiple cores.

Preferably, the mineral insulating layer is formed in one step by adopting non-calcined phlogopite tapes and extruded cross-linked polyethylene.

Preferably, the fireproof oxygen-insulating layer is formed by mixing magnesium oxide powder and building emulsion.

Preferably, the halogen-free low-smoke flame-retardant outer sheath is formed by extruding and wrapping a halogen-free low-smoke flame-retardant material.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model plays a role of transmitting electric energy through the copper conductive wire core, can be a round solid core, or can be a multi-core round twisted together, the mineral insulating layer adopts non-calcined gold mica tape and extruded cross-linked polyethylene to be formed at one time, the multi-layer overlapping concentric wrapping mode is adopted, the cross-linked polyethylene is formed by one-time extrusion, the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after cross-linking, the waterproof performance and the electric insulating performance of the cable are fully ensured, the fireproof oxygen-insulating layer adopts jelly formed by mixing magnesium oxide powder and building emulsion, the jelly is uniformly extruded and wrapped around the cable by a double-screw grouting machine and is filled into gaps of the wire core, then the jelly is tightened by a fireproof wrapping belt to fully play a role of insulating oxygen and attenuating heat, and the halogen-free low smoke flame-retardant outer sheath is extruded and formed by an environment-friendly halogen-free low smoke material, the metal sheath can be protected to adapt to various corrosive places, and meanwhile, the metal sheath has no influence on resources such as environment, underground water and the like.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 1. a copper conductive core; 2. a mineral insulation layer; 3. an extruded insulating layer; 4. a halogen-free flame-retardant filler rope; 5. a halogen-free flame retardant belting layer; 6. a fireproof oxygen-insulating layer; 7. there is not steamed low fire-retardant oversheath of cigarette.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description herein, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the patent and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the patent. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1, a metal-sheath-free flexible mineral-insulated fireproof cable comprises a copper conductive core 1, wherein the copper conductive core 1 is formed by circularly twisting multiple cores, a mineral insulating layer 2 is wrapped outside the copper conductive core 1, the mineral insulating layer 2 is formed by non-calcined aurum mica tapes and extruded cross-linked polyethylene in one step, an insulating material of the cable is continuously wrapped by an inorganic mineral insulating tape, the continuous length is long, the cable can meet the requirement of power supply length no matter a single-core cable or a multi-core cable, the continuous length can reach more than 1000m, no smoke or toxicity exists during combustion, an inorganic material is adopted for insulation, no harmful gas is generated during combustion, no secondary pollution is generated, the cable is an environment-friendly green product, the organic mineral insulated fireproof cable sometimes needs to be penetrated by a plastic pipe or an iron pipe, the plastic pipe is easy to age and become brittle, the iron pipe is easy to corrode, the fireproof cable has a copper sheath and does not need to be penetrated by the copper sheath, the copper sheath has good corrosion resistance, the extruded insulating layer 3 wraps the mineral insulating layer 2, and no electromagnetic interference exists, when the fireproof cable and the wires for information and control and the like are laid in the same vertical shaft, the fireproof cable does not generate interference on the information transmitted by the signal and control wires and cables under the shielding of the copper sheath, the safety is good, the fireproof cable can normally supply power in flame, the fire loss is reduced, and the personal safety is particularly reliable; the cable basically does not absorb moisture, the terminal installation is simple, the cable is similar to a common cable, the halogen-free flame-retardant filling rope 4 wraps the outer portion of the extruded insulating layer 3, the halogen-free flame-retardant filling rope 4 wraps the halogen-free flame-retardant wrapping tape layer 5, the halogen-free flame-retardant wrapping tape layer 5 wraps the fire-retardant oxygen-isolating layer 6, the fire-retardant oxygen-isolating layer 6 is formed by mixing magnesium oxide powder and building emulsion, the fire-retardant oxygen-isolating layer 6 wraps the halogen-free low-smoke flame-retardant outer sheath 7, the halogen-free low-smoke flame-retardant outer sheath 7 is formed by extruding and wrapping halogen-free low-smoke flame-retardant materials, the copper conductive wire core 1 plays a role in transmitting electric energy, can be a round solid core or a multi-core round twisted together, the mineral insulating layer 2 is formed by extruding non-calcined gold mica tapes and extruded crosslinked polyethylene in one step and is manufactured by adopting a multi-layer overlapping concentric wrapping mode, the crosslinked polyethylene is extruded and formed by one step, the molecular structure of polyethylene becomes three-dimensional network structure by linear structure after through the cross-linking, fully guarantee the waterproof performance and the electrical insulation performance of cable, fire prevention separates the jelly that oxygen layer 6 adopted magnesium oxide powder to add building emulsion to mix and forms, through the even crowded package of twin-screw grouter around the cable, and fill in the gap of sinle silk, then tie up with fire-resistant band, fully play the effect of isolated oxygen decay heat degree, and there is not steamed low cigarette fire-retardant type material crowded package shaping of zero halogen low cigarette fire-retardant oversheath 7 adoption environmental protection, can protect the place that the metal sheath can adapt to various corrosivities, also there is not any influence to resources such as environment and groundwater simultaneously.

The standard parts used in this document are commercially available, all the components in this document are customized according to the description of the specification and the drawings, and the connection relationship and specific structure between the layers in this document are all performed by the prior art, such as by mechanical methods, by adhesives, by various welding methods such as thermal welding, ultrasonic welding, flux, welding, and fusion crimping, and no specific description is made here.

When in use, the copper conductive wire core 1 plays a role of transmitting electric energy, can be a round solid core, or can be a multi-core round twisted together, the mineral insulating layer 2 is formed by one-step molding of non-calcined gold mica tape and extruded cross-linked polyethylene, and is manufactured by adopting a mode of multi-layer overlapping concentric wrapping, the cross-linked polyethylene is extruded and coated at one step, the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after cross-linking, the waterproof performance and the electric insulating performance of the cable are fully ensured, the fireproof oxygen-insulating layer 6 is jelly formed by mixing magnesium oxide powder and building emulsion, the jelly is uniformly extruded and coated around the cable by a double-screw grouting machine and is filled into gaps of the wire cores, then the jelly is tightly bound by a fireproof wrapping tape, the role of fully isolating oxygen attenuation heat is played, and the halogen-free low-smoke flame-retardant outer sheath 7 is extruded and formed by adopting an environment-friendly halogen-free low-smoke flame-retardant material, the metal sheath can be protected to adapt to various corrosive places, and meanwhile, the metal sheath has no influence on resources such as environment, underground water and the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a flexible mineral insulation fireproof cable of no metal covering, includes copper conductor core (1), its characterized in that: the outside parcel of copper conductor core (1) has mineral insulating layer (2), the outside parcel of mineral insulating layer (2) has crowded insulating layer (3) of package, the outside parcel of crowded insulating layer (3) of package has halogen-free fire-retardant filling rope (4), the outside parcel of halogen-free fire-retardant filling rope (4) has halogen-free fire-retardant band layer (5), the outside parcel of halogen-free fire-retardant band layer (5) has fire prevention oxygen barrier (6), the outside parcel of fire prevention oxygen barrier (6) has halogen-free low smoke fire-retardant oversheath (7).

2. The flexible mineral-insulated fireproof cable without metal sheath of claim 1, wherein: the copper conductive wire core (1) is formed by circularly twisting multiple cores.

3. The flexible mineral-insulated fireproof cable without metal sheath of claim 1, wherein: the mineral insulating layer (2) is formed by non-calcined phlogopite tapes and extruded cross-linked polyethylene in one step.

4. The flexible mineral-insulated fireproof cable without metal sheath of claim 1, wherein: the fireproof oxygen-insulating layer (6) is formed by mixing magnesium oxide powder and building emulsion.

5. The flexible mineral-insulated fireproof cable without metal sheath of claim 1, wherein: the halogen-free low-smoke flame-retardant outer sheath (7) is formed by extruding and wrapping halogen-free low-smoke flame-retardant materials.

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